Home / 100,671.09-138,901.39-74,487.22

Finding the Fourth Proportional to 100,671.09, 138,901.39 and 74,487.22

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Solution

The fourth proportional to 100,671.09, 138,901.39 and 74,487.22 is: 102,774.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,671.09 : 138,901.39 = 74,487.22 : x
  2. Step 2: Convert to fraction form
    100,671.09/138,901.39 = 74,487.22/x
  3. Step 3: Cross multiply
    100,671.09x = 138,901.39 × 74,487.22
  4. Step 4: Simplify right side
    100,671.09x = 10,346,378,395.24
  5. Step 5: Solve for x
    x = 10,346,378,395.24/100,671.09
  6. Step 6: Final answer
    x = 102,774.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.